Nowadays we carry on our hands phones with processing power equivalent to that of large supercomputers in the mid-1980s. For example, the processing power of an iPhone in 2018 was comparable to that of a Cray-2 which, with a price of around 30 million dollars (in equivalent terms in 2017), was the reference for supercomputers in 85. The dizzying speed in which we have seen the world of computing evolve surely cannot stand comparable to any other science. It has been very exciting for me to live so closely that story for almost the last four decades and the impact that it has had in our everyday lives.
My interest in computer science aroused during the last two years at the University of Barcelona (I studied Astrophysics) when still (in the 70's) the possibility of accessing a computer terminal was only within the reach of a few chosen. Writing a program then consisted of locking yourself in a room at the University (with long waiting lines for access!) where there was a giant punch card punch machine. There we typed the code written in the FORTRAN scientific language. Then we had to pack the pile of punched cards into a shoe box and had to rush to a Computer Center on a different University, hand the punch cards over to them at a desk and then collect a day or two afterwards a printed list with the results (if there were any!). As a matter of fact, if there were any errors the process and the cycle of trips had to be repeated in a loop for ever. Everyone must have lived that kind of experience to understand the impact of the advent of first personal computers by someone who had already been captivated by programming. But what it definitely changed my life was the appearance of the Macintosh in 1984. I had one of the first units thanks to the school in the US I was working for during those years. I started writing programs for my Math classes until after a few years I decided to change my profession to write programs for the Mac for living. Since then, in one way or another I've been linked to Apple, up to the point where I ended up working for the company in California, personally hired by Steve Jobs.